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T400 Ozone Analyzer Operator’s Manual Communications Setup and Operation
145
6.7.3. HESSEN COMM PORT CONFIGURATION
Hessen protocol requires the communication parameters of the T400’s COMM ports to
be set differently than the standard configuration as shown in the table below.
Table 6-4: RS-232 Communication Parameters for Hessen Protocol
PARAMETER STANDARD HESSEN
Baud Rate 300 – 115200 1200
Data Bits 8 7
Stop Bits 1 2
Parity None Even
Duplex Full Half
To change the baud rate of the T400’s COMM ports, see Section 6.2.2.
Note Make sure that the communication parameters of the host computer are
also properly set.
Note The instrument software has a 200 ms. latency before it responds to
commands issued by the host computer. This latency should present no
problems, but you should be aware of it and not issue commands to the
instrument too frequently.
06870C DCN6332